Document the new system-clock-fixed flag, which can be used to specify that the driver cannot or should not allow the clock frequency of the mapped clock to be modified.
Signed-off-by: Robert Hancock robert.hancock@calian.com --- .../devicetree/bindings/sound/simple-card.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml index 45fd9fd9eb54..00597dc4f396 100644 --- a/Documentation/devicetree/bindings/sound/simple-card.yaml +++ b/Documentation/devicetree/bindings/sound/simple-card.yaml @@ -48,6 +48,15 @@ definitions: It is useful for some aCPUs with fixed clocks. $ref: /schemas/types.yaml#/definitions/flag
+ system-clock-fixed: + description: | + Specifies that the clock frequency should not be modified. + Implied when system-clock-frequency is specified, but can be used when + a clock is mapped to the device whose frequency cannot or should not be + changed. When mclk-fs is also specified, this restricts the device to a + single fixed sampling rate. + $ref: /schemas/types.yaml#/definitions/flag + mclk-fs: description: | Multiplication factor between stream rate and codec mclk. @@ -134,6 +143,8 @@ definitions: $ref: "#/definitions/system-clock-frequency" system-clock-direction-out: $ref: "#/definitions/system-clock-direction-out" + system-clock-fixed: + $ref: "#/definitions/system-clock-fixed" required: - sound-dai